南昌电厂210m烟囱定向爆破拆除安全技术

介绍了210 m高钢筋混凝土烟囱定向控制爆破拆除的成功经验,着重介绍了电子数码雷管起爆网络和爆破安全技术,提出了防飞石、防飞溅、减振、降尘综合防护方法。     

火电厂烟塔合一和烟囱排放大气环境影响比较——以宝鸡第二发电厂为例

以宝鸡第二发电厂间接空冷机组为例,分别采用德国AUSTAL2000大气预测模式与美国AERMOD大气预测模式,对烟塔合一和烟囱两种排放方式的大气环境影响进行分析预测,并分析了地形因素对预测结果的影响。通过对比分析得知,烟塔合一排放的地面浓度分布较分散,而烟囱排放造成的地面浓度分布较集中。考虑地形影响时采用AUSTAL2000计算的烟塔合一地面浓度比AERMOD计算的烟囱小,不考虑地形时则反之。     

燃煤电厂“烟塔合一”模式下循环冷却水处理技术

介绍了燃煤电厂烟塔合一技术的发展趋势,探讨了烟塔合一模式对循环冷却水的影响,分析了烟塔合一模式下循环冷却水处理技术的可行性,提出了烟塔合一对循环水的影响对策。     

关于焦化厂焦炉烟囱二氧化硫排放分析

论文通过介绍焦化厂的工艺流程,分析焦化厂硫的来源及去向,通过数据比对,分析焦炉烟囱SO2满足达标要求时,入炉煤中含硫量以及相应的脱硫效率之间的关系,得出焦炉烟囱SO2排放浓度达标所需的条件。     

有组织排放气态污染物现场监测中应注意的问题

针对有组织排放工业废气污染物监测中存在的一些疑难问题,从监测点位的选择、湿度较大废气的预处理、较大负压条件下仪器的选择等方面进行了探讨,提出了一些解决办法。     

火力发电厂烟囱选型

以铁岭发电厂二期2×600MW超超临界机组工程240m烟囱型式的选择为例，在简要介绍烟囱的一般型式、烟囱的选型原则和国内烟囱选型情况的基础上，进行比选并确定最终方案。     

高层建筑管道井内烟气运动大涡模拟

采用火灾过程的场模拟理论,以大涡模拟为基础,分析了火灾烟气流动过程的动力学特征;为了验证大涡模拟数值方法的准确性,针对Mercier和Jaluria竖井内的实验工况进行了模拟研究,其模拟结果与试验结果吻合较好,表明大涡模拟可以较好地预测竖井内烟气流动情况;通过设定不同的火灾场景,对不同火源功率和不同几何尺寸条件下管道井内烟气的流动过程进行了数值模拟,其结果给出了不同的几何尺寸和火源功率对管道井内所形成“烟囱效应”的影响情况。笔者的模拟和研究表明:大涡模拟可较准确地预测高层建筑管道井内烟气的流动状态,对高层建筑的防火设计具有指导性作用。     

卧式锅炉烟管拼接问题探讨

通过对锅炉烟管破坏强度的理论分析，提出了卧式锅炉烟管在制造、维修过程中不宜采用拼接形式的建议。     

多管集气式新型烟囱的结构及烟气流动模式的研究

本文论述了十管集气高烟囱的新型结构及相应的烟气流动规律，从烟囱造价、施工构造和使用效果等方面进行优化组合，以达到多管烟囱和集合式烟囱二种优点于一体的目的。     

Canopy slope effect on the performance of the solar chimney power plant

Solar chimney power plants constitute an impressive construction by its size and its output seems low for its dimensions. Although many works have been carried out on the subject, there is still much scientific and technical improvement to be done. In the present work, we consider the modeling of turbulent flow under the effect of natural convection within a solar chimney power plant (SCPP) by performing numerical simulation using the Saturne Code coupled with Syrthes code. The objective of the study is the analysis of the collector cover slope influence on the performance of the SCPP in two cases. In the first case, the storage system considered is composed solely of the ground under the collector. For the second case, the storage system is made, in addition to the ground, of a 10 cm thick tub filled with water, covering the entire surface of the collector. The concept of minimizing the entropy production is also studied with the objective of optimizing the geometric configuration as well as the effect of the collector cover slope on the efficiency of SCPP. The boundary conditions are defined according to the meteorological data for a typical day available on the site of Adrar, Algeria. The results allow us to focus on the storage system influence on the SCPP performance and the duration of its operation after sunset. This leads to the improvement of the global efficiency of the SCPP. Results show the positive impact of the extra storage media use and the configuration which improves the velocity at the chimney entrance.